/*
 * Created on 17-Jan-2006
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package com.aelitis.azureus.core.networkmanager.impl;

import java.io.IOException;
import java.nio.ByteBuffer;

public class TransportHelperFilterStreamCipher extends TransportHelperFilterStream {
    private TransportCipher read_cipher;
    private TransportCipher write_cipher;

    public TransportHelperFilterStreamCipher(TransportHelper _transport, TransportCipher _read_cipher, TransportCipher _write_cipher) {
        super(_transport);

        read_cipher = _read_cipher;
        write_cipher = _write_cipher;
    }

    protected void cryptoOut(ByteBuffer source_buffer, ByteBuffer target_buffer)

    throws IOException {
        write_cipher.update(source_buffer, target_buffer);
    }

    protected void cryptoIn(ByteBuffer source_buffer, ByteBuffer target_buffer)

    throws IOException {
        read_cipher.update(source_buffer, target_buffer);
    }

    public boolean isEncrypted() {
        return (true);
    }

    public String getName(boolean verbose) {
        String proto_str = getHelper().getName(verbose);

        if (proto_str.length() > 0) {

            proto_str = " (" + proto_str + ")";
        }

        return (read_cipher.getName() + proto_str);
    }
}
